Improvement in mica chimneys for lamps



E. S. GAYLORD.

Mica Lamp Chimney.

Patehted June 24. 1862.

N. PETERS howuum m her. Wnhlngmn, n. c.

UNITED STATES PATENT OFFICE.

EDWIN s. GAYLORD, or HARTFORD, CONNECTICUT.

IMPROVEMENT IN MICA CHIMNEYS FOR LAMPS.

Specification forming part of Letters Patent No. 35,675, (lat-ell June 2-1, 18172.

To all whom it may concern:

Be it known that I, EDWIN S. GAYLORD, of Hartford, county of Hartford and State of Connecticut, have invented a certain new and useful Improvement in Lampflhimneys; and

- I do hereby declare that the same is described and represented in the following specification and drawings.

To enable others skilled in the art to make and use the invention, I will proceed to describe its construction and advantage, referring to the drawings, in which the same letters indicate like parts in each of the figures.

The nature of this improvement in lampchimneys'consists in the use or application of mica, in combination with form and 'compression ringsat'the top and bottom thereof, and a lateral joint-bar made single or in the form of a double-S clasp to hold or cover the edge of the mica, the object of which is to produce a cheaper and a more indestructible article of use and trade. I

In the accompanying drawings, Figure l is an elevation showing the outside of the double-S clasp (or lock-joint) extending nearly or quite the whole length of the chimney, and the upper and lower outside compression-rings. Fig. 2 is a section cut lengthwise ot'the chimney, showing the. mica compressed between the inner and outer rings both at thetop and bottom. Fig. 3 is a cross section showing the edges ofthe mica compressed between the lap edges of the doubles-shaped clasp (or lock-.

joint.) I propose some imes to dispense with the double-S clasp and substitute therefor a plain joint-plate to-cover the outside of the joint.

it shows the mica, which forms the chimney proper.

b and b show the double 8 clasp and jointplate.

. cshows the compression-rings at the top and bottom of the chimney.

I usually (in making these chimneys) have a former made round, oval, or other desired .shape, and have the rings 0 made to correspond in shape thereto; I then bend the mica around saidformer and secure the edges of the mica between the laps of the double 8 clasp b, or Iflplace the joint-plate b over. the

Joint of the mica and secure them together by the upper and lowerouter rings, 0. I then remove the chimney froin the former and crowd the upper and lower rings closely to their places on the inside. By this mode of manufacture it will be apparent'that a good and useful article is produced.

I believe I have thus shown the nature, construction, and the advantage to be derived from the use of this improvement clearly enough to enable a person skilled in the art to make the same.

What I claim as new and of my own invention, as a new and improved article of manu faeture, is-

A; mica chimney for lamps, 860., the combination of mica a, formcompression rings 0, and a lateral joint-bar, b, or double-S clasp 12, substantially in the manner as and for the piirpose described. y

.In witness witness whereof] have hereunto set my hand this 24th day of March, 1862.

Eowm S. GAYLORD.

Witnesses:

JOHN S. BUNNELL, JEREMY W. BLIss. 

